After dying suddenly from overwork and transmigrating, Qin Hao finds himself the twelve-year-old puppet emperor of the fictional Great Yin Dynasty. At his coronation, the powerful and treacherous prime minister Yuwen Tuo forces him to publicly decree his birth mother's death, hoping to seize complete control of the throne. With no way out, Qin Hao grabs the Imperial Jade Seal and hurls it at Yuwen Tuo. “I am the Mandate of Heaven!” The seal shatters, nine dragons burst into the air, and a mysterious National Fate System activates. Qin Hao is shocked to discover that in this fantasy world, territory is cultivation and popular support is magical power! To become the Supreme Sovereign, he must first strengthen the nation, enrich the people, and conquer the lands in every direction.
He spreads miracle-seed potatoes to end the people's hunger and earn boundless merit; establishes the Embroidered Uniform Guard to keep watch over every official and cleanse the court with corrupt officials' blood; reforms the military and builds an army of iron. When a million enemy soldiers surround the capital, Qin Hao rises into the air as dragon energy surges through the land for thousands of miles. “Every inch of ground beneath your feet is part of my dantian!”
Secluded sects covet the dragon veins, while immortals and gods lust after the nation's fate. Qin Hao commands the nation's fate in a mortal body, nine dragons circling him as he challenges the immortals and gods. “You old relics! It's time to start paying rent for the dragon vein beneath your sect!”
Meanwhile, Ying Yue, daughter of the former dynasty's commander of the secret guards, is ordered by her master to infiltrate the palace and monitor the “changed” young emperor. But through his thrilling counterattacks and acts of protection, she witnesses the nine dragons soar, and affection blossoms in her heart. From surveillance to protection, from suspicion to devotion, she becomes the one blade and shadow he can trust at his back, ruling with him over this magnificent realm stretching thousands of miles.